Patent US4726978A successfully refreshed from Google Patents.
US4726978A
Expired / Lapsed
US
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Charcoal fabric needled to supporting fabrics
Assignee: Siebe Gorman and Co Ltd
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Filing: 1986-10-22
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Granted: 1988-02-23
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Expires: 2006-10-22
Abstract
Abstract A layer of a non-woven or open-woven or open-knitted charcoal cloth is supported on a layer of a textile material having fibers needle-punched through the charcoal cloth. This composite material can be incorporated in various multi-layer structures having, for example, a further textile layer and/or a microporous or similar layer on the other side of the charcoal cloth. Such multi-layer structures may be used in protective clothing, as filter materials or in medical dressings, or in the manufacture of moulded articles such as face masks.
Inventors
- 👤 Keith Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:44
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/06; B01; B01D; B01D39/00; B01D39/08; B01D39/086; B01D39/14; B01D39/20; B01D39/2055; B01D39/2065; B32B5/022; B32B5/22; B32B5/24; B32B5/26; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/425; D04H1/4258; D04H1/44; D04H1/46; D04H1/498; D04H13/00; B01D2239/00; B01D2239/04; B01D2239/0414; B01D2239/0435; B01D2239/0457; B01D2239/06; B01D2239/065; B01D2239/0654; B01D2239/0659; B01D2239/12; B01D2239/1216; B01D2239/1291; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/726; B32B2307/7265; B32B2535/00; B32B2571/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/30; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/133; Y10T442/134; Y10T442/40; Y10T442/494
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
30 words
A composite material comprising a layer of a non-woven or open-knitted or open-woven charcoal cloth supported on a layer of a textile material having fibres needle-punched through the charcoal cloth.
Claim 2
Dependent Claim
30 words
A composite material comprising a layer of a non-woven or open-knitted or open-woven charcoal cloth supported on a layer of a textile material having fibres needle-punched through the charcoal cloth.
Claim 3
Dependent Claim
29 words
A composite material as claimed in claim 1, in which the charcoal cloth is disposed between the said needle-punched textile layer and a further layer of a textile material.
Claim 4
Dependent Claim
23 words
A composite material as claimed in claim 2, wherein fibres of the said further textile layer are also needle-punched through the charcoal cloth.
Claim 5
Dependent Claim
28 words
A composite material as claimed in claim 2 wherein fibres of the or each needle-punched textile layer are needle-punched so as to extend through the other textile layer.
Claim 6
Dependent Claim
35 words
A composite material as claimed claim 2 wherein one of the said textile layers is relatively thick and comprises a hydrophilic, absorbent material and the other layer is relatively thin and comprises a hydrophobic material.
Claim 7
Dependent Claim
34 words
A composite material as claimed in claim 1, wherein there is a protective layer of a liquid-impermeable, vapour-permeable material attached to the charcoal cloth on the side remote from the said needle-punched textile layer.
Claim 8
Dependent Claim
17 words
A composite material as claimed in claim 6, wherein the liquid-impermeable, vapour-permeable layer comprises a microporous material.
Claim 9
Dependent Claim
21 words
A composite material as claimed in claim 6 wherein the liquid-impermeable, vapour-permeable layer is attached to the charcoal cloth by lamination.
Claim 10
Dependent Claim
16 words
A composite material as claimed claim 2 which includes a layer of a liquid-impermeable, vapour-permeable material.
Claim 11
Dependent Claim
21 words
A composite material as claimed in claim 9, wherein the liquid-impermeable, vapour-permeable layer is an outermost layer of the composite material.
Claim 12
Dependent Claim
31 words
A composite material as claimed claim 1, wherein the charcoal cloth is an open-knitted or open-woven material, preferably having a mesh size in the range of from 0.1 to 0.7 mm.
Claim 13
Dependent Claim
35 words
A composite material as claimed in claim 1, wherein the weight of the charcoal cloth is in the range of from 80 to 240 g/m 2 , preferably from 110 to 180 g/m 2 .
Claim 14
Dependent Claim
23 words
A composite material as claimed in claim 1, wherein the or at least one of the said textile layers is a non-woven material.
Claim 15
Dependent Claim
21 words
A composite material as claimed in claim 1, wherein the or at least one needle-punched textile layer is a non-woven material.
Claim 16
Dependent Claim
13 words
A composite material as claimed in claim 1, which is a single-needled structure.
Claim 17
Dependent Claim
42 words
A composite material as claimed in claim 1, wherein the weight of the or at least one of the said textile layers is in the range of from 12.5 to 300 g/m 2 , preferably from 25 to 250 g/m 2 .
Claim 18
Dependent Claim
23 words
A composite material as claimed in claim 1, wherein the or at least one of the said textile layers comprises a heat-formable material.
Claim 19
Dependent Claim
16 words
A composite material as claimed in claim 1, which contains no adhesive material bonding the layers.
Claim 20
Dependent Claim
43 words
A process for making a composite material according to claim 1, which comprises arranging a layer of a non-woven or open-knitted or open-woven charcoal cloth on a layer of a textile material, and needle-punching fibres of the textile material through the charcoal cloth.
Claim 21
Dependent Claim
36 words
A process as claimed in claim 19, wherein the charcoal cloth is arranged between two layers of textile material, and fibres of at least one of the textile layers are needle-punched through the resulting multi-layered structure.
Claim 22
Dependent Claim
55 words
A process as claimed in claim 20, wherein one or each of the textile layers comprises a fusible thermoplastic material and, after the needle-punching of fibres of the or at least one of those layers through the multi-layered structure, the composite material is heated to bond together at least a proportion of the fusible fibres.
Claim 23
Dependent Claim
57 words
A process as claimed in claim 20, wherein one or each of the textile layers comprises a fusible thermoplastic material and, after the needle-punching of fibres of the or at least one of those layers through the multi-layered structure, the composite material is passed through calendering rollers having heated projections to effect point-sealing of the fusible fibres.
Claim 24
Dependent Claim
23 words
An article of protective clothing, a medical dressing, a filter or a moulded article, comprising a composite material as claimed in claim 1.
References Cited (Backward Citations)
US4250172A
Cited
EP0079808A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |